net.sf.saxon.expr

## Interface ContextMappingFunction<T extends Item>

- All Known Implementing Classes:
    AnalyzeMappingFunction, CompiledContextMappingFunction, ForEach, ForEachGroup, MultithreadedForEach, SimpleStepExpression, SlashExpression

      public interface ContextMappingFunction<T extends Item>

  ContextMappingFunction is an interface that must be satisfied by an object passed to a ContextMappingIterator. It represents an object which, given an Item, can return a SequenceIterator that delivers a sequence of zero or more Items.

  This is a specialization of the more general MappingFunction class: it differs in that each item being processed becomes the context item while it is being processed.

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `SequenceIterator<T>` | `map(XPathContext context)` Map one item to a sequence.

- - ### Method Detail

    - #### map

          SequenceIterator<T> map(XPathContext context)
                                               throws XPathException

      Map one item to a sequence.
      Parameters:
        `context` - The processing context. The item to be mapped is the context item identified from this context: the values of position() and last() also relate to the set of items being mapped
      Returns:
        a SequenceIterator over the sequence of items that the supplied input item maps to
      Throws:
        `XPathException` - if a dynamic error is detected

Copyright (c) 2004-2013 Saxonica Limited. All rights reserved.